Magnetized Plasmoid Injection with Modular Impurity Electrode Control
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Solution Overview
Problem
Existing magnetized plasmoid injection devices face challenges in accurately controlling impurity concentration and replacing electrodes, especially in ultra-high vacuum systems, leading to high costs and complex maintenance.
Innovation Solution
A magnetized plasmoid injection device with a cylindrical external and internal electrode configuration, including a plasma generating gas supply, magnetic field generation, and an impurity generation unit with a thin-rod electrode, allowing for precise control of impurity concentration and easy replacement of impurities without opening the vacuum chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the internal electrode is used as the impurity source, then the device structure is simple, but the impurity concentration control precision is poor and electrode replacement is complex
Solution Approach 1:
The device is segmented into distinct functional units: the internal electrode for plasma generation and the impurity generation unit for impurity supply. The impurity generation unit includes a separate rod electrode that can be independently controlled, allowing precise impurity concentration control without affecting the plasma generation electrode structure.
Solution Approach 2:
An impurity generation unit is introduced as an intermediary component between the plasma generation system and the impurity source. This unit includes a rod electrode surrounded by a cover electrode, creating a controlled environment for impurity generation that mediates between the main plasma discharge and the impurity injection process.
2Device complexity
If the internal electrode is used as the impurity source, then no additional impurity generation unit is needed, but electrode replacement requires opening the vacuum chamber
Solution Approach 1:
The impurity generation unit is designed as a separate, modular component with the rod electrode and cover electrode that can be independently replaced. This segmentation allows the impurity generation components to be serviced without affecting the main plasma generation electrode or requiring vacuum chamber opening.
Solution Approach 2:
The cover electrode acts as an intermediary protective structure that encloses the rod electrode. This design allows the rod electrode to be replaced through the opening in the cover electrode without exposing the internal electrode or opening the main vacuum chamber, simplifying maintenance operations.
3Manufacturing precision
If a separate impurity generation unit is added, then impurity concentration control precision is improved, but device structure becomes more complex
Solution Approach 1:
The impurity generation unit is designed with multi-functionality: the rod electrode serves as both the impurity source and a structural component, while the cover electrode provides both structural enclosure and electrical isolation. This multi-functionality reduces the need for additional separate components, mitigating the increase in device complexity.
Solution Approach 2:
The rod electrode is nested within the cover electrode, creating a compact hierarchical structure. This nesting arrangement allows the impurity generation unit to be integrated into the existing device space without requiring proportionally more external structure, thus limiting the increase in overall device complexity.
4Ease of repair
If a separate impurity generation unit is added, then electrode replacement is simplified, but device structure becomes more complex
Solution Approach 1:
The impurity generation unit is segmented as a modular assembly with the rod electrode and cover electrode that can be replaced as a unit or individually. This modular segmentation simplifies replacement procedures while the compact integrated design of the unit itself limits the overall structural complexity increase.
Solution Approach 2:
The cover electrode serves as an intermediary structure that facilitates easy access to the rod electrode for replacement. By providing a protective enclosure with an accessible opening, it simplifies maintenance operations while adding a necessary structural layer that is integrated into the overall compact design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate control of impurity concentration in magnetized plasmoids and simplifies electrode replacement, reducing maintenance time and costs while improving handleability and efficiency in injecting impurities into magnetic confinement plasmas.
Implementation Method 1
a plasma power supply configured to apply a discharge voltage between the external electrode and the internal electrode
Implementation Method 2
a magnetic field generation unit configured to apply a magnetic field that generates magnetized plasmoid between the external electrode and the internal electrode
Implementation Method 3
The magnetized plasmoid high-speed injection device has an effect that an electrode is sputtered by a current at the time of plasma generation
Data Source
AI summary
A magnetized plasmoid injection device including a cylindrical external electrode, a cylindrical internal electrode coaxially disposed inside the external electrode, a plasma generating gas supply unit that supplies plasma generating gas in a pulse shape between the external electrode and the internal electrode, a magnetic field generation unit that applies a magnetic field that generates magnetized plasmoid between the external electrode and the internal electrode, a power supply control unit that applies a discharge voltage between the external electrode and the internal electrode, and an impurity generation unit that contains an impurity in the magnetized plasmoid, the impurity generation unit having a cover electrode that opens to the external electrode, a thin-rod electrode that is located inside the cover electrode and is formed of an impurity, and an impurity generation power supply that applies a voltage to the cover electrode and the thin-rod electrode.